McCarthy, Blaine Gould, authorMiyake, Garret, advisorBandar, Jeffrey, committee memberKrummel, Amber, committee memberJames, Susan, committee member2020-06-222020-06-222020https://hdl.handle.net/10217/208563N-aryl phenoxazines were identified as a new family of organic photoredox catalysts capable of effecting single electron transfer reductions from the photoexcited state. A number of phenoxazines bearing different N-aryl and core substituents were synthesized, characterized, and employed as catalysts. Spectroscopic and electrochemical characterization of these phenoxazines was used to establish structure-property relationships for the design of visible-light absorbing, strongly reducing organic photoredox catalysts. The application of phenoxazines as catalysts for organocatalyzed atom transfer radical polymerization (O-ATRP), a light-driven method for the synthesis of well-defined polymers, revealed the importance of several catalyst properties for achieving control over the polymerization. Investigation of the properties and catalytic performance of N-aryl phenoxazines has provided fundamental insight into the reactivity of organic excited state reductants and photophysical properties of organic molecules. The catalysts developed through this work provide sustainable alternatives to more commonly used precious-metal containing photoredox catalysts.born digitaldoctoral dissertationsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.photochemistrypolymer chemistryphotoredox catalysiscatalysisText